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What is a regular expression for a MAC Address?
In this format:
21 Answers
21
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glVertexAttribPointer clarification
Just want to make sure I understand this correctly (I'd ask on SO Chat, but it's dead in there!):
2 Answers
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Why doesn't c++ have &&= or ||= for booleans?
...ng" that can happen &&= and ||= were used as syntactic sugar for bool foo = foo && bar and bool foo = foo || bar ?
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Should one use < or
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The first is more idiomatic. In particular, it indicates (in a 0-based sense) the number of iterations. When using something 1-based (e.g. JDBC, IIRC) I might be tempted to use <=. So:
for (int i=0; i < count; i++) // For 0-based AP...
Get last dirname/filename in a file path argument in Bash
I'm trying to write a post-commit hook for SVN, which is hosted on our development server. My goal is to try to automatically checkout a copy of the committed project to the directory where it is hosted on the server. However I need to be able to read only the last directory in the directory strin...
What is that “total” in the very first line after ls -l? [closed]
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You can find the definition of that line in the ls documentation for your platform. For coreutils ls (the one found on a lot of Linux systems), the information can be found via info coreutils ls:
For each directory that is listed, preface the files with a line
`total BLOCKS', whe...
OSError: [Errno 2] No such file or directory while using python subprocess in Django
...inside Python code using subprocess.call() which throws the following error:
3 Answers
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How to extract text from a string using sed?
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The pattern \d might not be supported by your sed. Try [0-9] or [[:digit:]] instead.
To only print the actual match (not the entire matching line), use a substitution.
sed -n 's/.*\([0-9][0-9]*G[0-9][0-9]*\).*/\1/p'
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OO Design in Rails: Where to put stuff
... and I enjoy Ruby being very OO. Still, the tendency to make huge ActiveRecord subclasses and huge controllers is quite natural (even if you do use a controller per resource). If you were to create deeper object worlds, where would you put the classes (and modules, I suppose)? I'm asking about views...
Should I be using object literals or constructor functions?
...haviour associated with an object (i.e. if the object is just a container for data/state), I would use an object literal.
var data = {
foo: 42,
bar: 43
};
Apply the KISS principle. If you don't need anything beyond a simple container of data, go with a simple literal.
If you want to add ...